Auxiliary beam-compass kit for drawing instruments



July 10, 1928. F. SCHWARTZ AUXILIARY BEAM COMPASS KIT For: DRAWING INSTRUMENTS Filed 00t.'30, 1926 6 INVENTOR Frank Schwarrz Patented July 10,1928

FRANK SC WARTZ, or NEWYORK; n. Y.

' Animus? Ema/ onnes rrr son DRAWING insrnmvriiniisf Atalanta fi1e&pft ber 3q, 192e.1 senalno; 145,112.

My present invention relates generally to drawing lnstruments, and has particular ret set "of drawing instruments.

erej etoa beamcompass device designed to lie utilized as' an 'a'ukilia'ry to an ordinary "A11 object of theinvention is to provide a beam compass device in the nature ot'an' auxiliary kit whose tunction'it' is to makecomponent parts are of an extremely simple striictural nature Wholly separable from each other and hence associable in a variety (if tvays to meet varyingrequirements.'

Another object is to provide a device of the character reterre'd'to wherein portionsthereof constitute a set of instrumentalities having certaing-eneric similarities of con-- 7 strnction and purpose and certain specific ,variationsf having predetermined purposes, whereby such .a set may be sold ndependently and varied as to SPGClfiC differences,

number of component elements, etc. to suit the difi'ering'requirements of different users. Briefly, my invention contemplates the provision ofa beam, 21' set of instrument-en'- gaging members'ot the character just re f'ler'red to, and means for variably associatingcertaih selected members with sald beam.

In accordance With my invention, these component elements are wholly separable one from the other, and may there'lore be of extremely simple C(jfiStruCtiOn, rendering their manufactnre inexpensive. Further- 'Iihore, the separable, nature of the compo nent elements may permit replacement of one or the other thereof, or the sale thereof I in varying combinations; and in general serve to render my invention extremely simple, useful, flexible, andeflic1entj Mote particularly, this feature maternplates the provision of a beam \vhich'may cti'r'r'iprise nothing. more than a a rectangular stripbf material. In a preferred constructioti, the beam is made of suitably polished Woodan'd isprovided 'wi'thfat least one 101 gitu'dinal slot 'Whi'chlightens its eight and which cooperates in a desirable manner with a preterre'd torm of construction of the other elements of the device; I p v fIn accordancefiwith the same feature, the

positionand secures engagement members. comprise separate and independent blanks of material, preferably metal, such as nickel, eachot the blanks be-:

ing formed of nothing more than a single area of sheet materialsuitably configured;

In this connection, it is a particular feature out my lIlYBntlOD to ltorm each 01 these memhere with a substantially flat medial or body portion, and crimped or configured endportlons designed ments.

, In accordance with the same feature, the,

means for selectively securing the members to the. beam ismade to comprise clamping devices of extremely simple "construction,

to accommodate the instru each clamping device preferably comprising H only tyvo'relatively adjustable element-s. In" th s connect on," another feature of tl1e"invention hes in providing each vclamping def vice With means for ,adjustably securing a selected instrument thereto and toithe team; I I i sa d means beingso' arranged and construct ed as to simultaneously serve to secure the clamping device itself in adjusted position along the A; preferred form and which engages, as by embracing, the beam; and another element Which engages the'fii'st and is adapted to also engage the instrument-retaining member.

clamping device comprises one 1 element a which is.slidablyradmstablealong the beam In a preferred form of the inr e'nti'on,"the

last mentioned element of theclainping 'de vice extends throughthe slot in the bean'i, and engages-the, medial port-ion ,oi' an. engagenrent member; and the adjustment of the elementsot the clamping device causes a binding action to take place which simuL t-aneously securesa desiredinstrument in p the clamping device itself to'the beam. i I

l/Vith reference to the set ot engagement members,"it is a particular featureotfmy invention to; provide opposite channelled ends upon'each, these ends be ng designed to acconnnodate the instruments, and each end being .difierent in. structural nature from the opposite end of the same member and from all the other ends of the set. ln accordance with this teature,the clamping devices may be iitiliz'ed'to interchangeably secure selected members to the'beam, thereby rendering it possible by'virtue -ot'thejdi'tleringjend portions of the members to variably assoments to the beam.

, a 1719 ciatea large number of d fierlng mstrm companying drawings in which- Fig. 1 is a front elevational view of a beam compass compositely formed in accordance with my invention and employing, for illustrative purposes, two'particular ele-' ments of a drawing set, and certain selected elements of the present invention;

Fig. 2 is a cross-sectional view taken along the line 2-2 of Fig. 1;

F 3 is a cross-sectional view taken at right angles to Fig. 2, and along the line 33 of Fig. 1;

Fig. 4 is a view similar to Fig. 3 taken along the line 4& of Fig. 1;

Fig. 5 is an exploded View of certain elements of the device;

Fig. 6 is a perspective view of a typical instrument-engaging member; and

Fig. 7 is a view similar to Fig. 6 showing a differenttype of instrument-engaging member. 7

Referring to the drawings and particularly to Fig. 1, it will be observed that I have shown an elongated beam 10 which is preferably of smooth polished wood having a rectangular cross-section. In the form shown, this beam is provided with two aligned longitudinal slots 11.

Slidably adjusted along the beam, I have shown two clamping devices, each of the devicesbeing of a structure which renders it associable with one of the slotted portions of the beam. In the particular embodiment shown, each clamping device comprises two relatively adjustable elements 12 and 13, the former being in the form of a channel element whose sides let (Fig. 2) engage the top and bottom respectively of the beam 10, and whose body portion 15 is arranged flush against one side of the beam 10. It will be obvious that this element may, if desired, be of slightly differing construction, as for example in the form of a sleeve wholly embracing the beam 10. The other element 13 of each clamping device comprises a boltlike element having an elongated bolt portion 16 and ahead 17 constructed for manual adjustment thereof. In the embodiment shown','the slidable element 12 is apertured, having a centrally located threaded bore, and the end of the element 13 is threaded to engage within said aperture. Also, it will be observed that theelongatedportion of the portion 13 extends through the slot so as to position its head 17 on the opposite side whose function will be presently explained. Referring for the moment to Fig. 6 which illustrates a typical engagement member, it

will be observed that I haveshown an in- Referring again to Fig. 2, it will be ob served that the engagement member, of the type illustrated in Fig. 6, is placed against that side of the beam which is opposite the body portion 15 of the slidable element 12,

the body portion of the beam 19 of the engagement member being arranged flush against said side. It will also be observed that the adjustable element 13 is so positioned as to extend through the aperture 22 in the engagement member, and it will be obvious that adjustment of the elements of the clamping device will firmly securenot only the engagen'ient member to the beam, but will also secure the clamping device it self in desired position along the beam. More particularly, it will be observed that the shoulder 18 will bear against the body portion 19, while at the same time the thread ed end will. engage with'the slidable element .12, thereby causing the latter and the engagement member to sides of the beam 10."

In Iiig. 1 I have shown the employment with the elements just described of an auxiliary spacing plate 23 which may be interposed between the body portion 19 and the side of the beam 10, it being understood that the employment of such a plate is entirely bind against opposite optional and may be found desirable in certain cases.

Having thus described the general nature of the elements of my invention, I shall now point out the specific differences and generic similarities between the component elements of the instrument-engaging set.

I have already pointed out, and illustrated in Fig. 6, how the opposite ends of each engaging member are crimped or configured to form channel portions 20 and 21. The end portions 20 and 21 differ from each other in size and configuration, and differ also from the configurations and sizes of the analagous end portions of the other members of the set. For example, the engagement member 24 (Fig. 5) is shown as provided with end portions 25 and 9.6 (:liii'ering from each other and from the end portions 20 and 21. Similarly, the differences between the end portions 27 and 28 of the engagen'ient member shown in F 3 are clearlyfdiscernible in this figure. In Fig. 4 I have shown another en agement member whose-end portions 29 and 30 are again different fromeach other and from the other end portions of the set.

It will be noted,however, that each ofthe {which form acute angles with the other strument.

engagement members is proyided wih a medial or body portion ofthe type indicated the reference'nu'meral 19 in Fig.6, and '1-tw-11l thus-be'observed that any selected engagement membermay be associated with one of the clamping de ices simply by cansing engagement of the clamping device With the body I portion of the engagement member.

still further te'atureio'f my invention disposes the channels at the ends of certain of the engagement members along. lines edges ofthe member.-' One such' en'gagement I member is illustrated in Fig.1 wherein it will be observed that the channelled end portions '27 and 28 are arranged at a'slightim.

'clinationto the other edges ofthe-m ember,

this inclination beingupwardly 'andtothe left in-Fig. .The purpose of: this inclination Willbe present'ly "described, but it may lie-explained at thispoint thatcerta'in others oiigthe setyare -arranged with an iopposite inclination; F or example, the endportions and '26 Oil 1g..- 5 are oi nthis' character.

"It-willnotv be. understoodthat inthe utili zation 'of 'my kit, two selected. engagement members are associated With tivo clamping devices as shown in -Fig.'1. IThe selectionzo-t' the engagement'members will 'depe'ndupon' the characteristics of the beam compass. deslred. -Where two-clamping1dev1cesrare. pro.-

yided and utilizedyone thereof Will-b66111- played to engage an in-st-rument .having 'a pointed: element -'so' that this; element Emay serve'as the central pivotpoint :of the com.- posite beam. compass. u'llh'us, in. Fig.', -l, I have shown an ordinary 'bow-spring :pair of dividers 29ginsp'ro'per engagement With-the engagement member. Moreplarticu'larly, one

' leg 30 of thedividers. is accommodated within and engaged by the channelled end portion 27, Whilesthe other-end or leg "31' of the 'dividers'is fre'eancl ez itendsidowm 'w ardly.*to theboardor paper upon' which-its point will findxsupp'o'rt. It avillnow belfobvio us that by inclining the channelled 'end,

:the free leg of the instrument: may be :made to assume a position substantially perpendicular to the plane of the board as' sho'wn'in Fig. 1. Fur thermore, it Will-.136- funde'rstood thattheiinclination. sho-wnzin Fig. 1 Will be suitable'for -a draftsman who-is-rightdianded; Whereas anopposite inclination would be suitable for use bya draftsman Whois'lef handed. In the latter case; the instrument constituting r the pivot point :Would :be' desirably loc'ated at'the opposite end oi "the beam 10". I It 7 will also be-"observed that the; engagement afforded by the engagement meinb er 1s such'astopermit-:ezitremely accurate microm V eterad ustment of -the overall length-of the beam compass by a simplemanipulation:of lthe'wheel '32 already: associated *Wltllthe 1n- :Foryillustra't'ive .pfurposes=,.::l..hai e sshbarn i the beam-compass'devrceot i1 as eniundying at its opposite ta" ailing p Whose fhandle 34 is rectangular, in cro tion.. For the engagement iotsuchan ins :ment anengagementimembeifllias been se i -lected 'W h'ose channel-portions are notniny 'chne'd, and one-of Whose 'ClltI1H6l .portioin-s as T itably configured (as shown-in .Fi g. 4;) t0 engage therectang'ularzhandl 34 f th mstrument-i33; I

" Obviously; more .ith-an v{two clamping die:-

,vicesJ-ma'y-be-emplo'yed,;ifv desired, so that even concentric :cZu-rves may ,bejdrawiri by.

the composite ;beam.;compass which might be ltor m-ed.

- l il hei'e -the instruments to beiengaged have shanks which-are circularain Cross-section, it

may be vfound clesi-rable ,to {increase the se e I employing an engagement niemberof the I character shownin ;Fi-g. 7. yilhis member curity with: which these shanks; are. heldby has body il 9iand-1channelled -endportions end'ge'dge of, thechannel, is. however icon: "OlhHBCl OIlfSO as to; proyi'dea portion 135. WhlC'h and q2l =substantially ssimilar to the cornea; J

s'ponding elements 1o-fqFig. 6a: The extremfilwm doubles 'ba-ek; onajthe channel 20 and, a portion 35 which then-extendsqau' ay -t'-ro1n .the channely20 is disposed ina plane substantial :ly parallel; to the :body portion. :19.

employment; of an engagement 1 member of v this -charaoter g is exactly .the sameua's the" H11 oth me be s excep Ethat yth.6;6Xi Qi1(-lCl 1')o, r ti o,n v .13 6. v .e gtends 5 across .1 h g p. be we ir elt eg ef, tor-12m? I ple, a pair )-f diyiders. as shownv in fig, '1

employment and in this" ayithe c l yiders are g .preyented from -a -possible; rotating movement about the "engaged-shank -..or.;legl "as an axis.

., "It W-i-llth 1s beobserved thatfIhave a device having;- a ide ariety of uses and therefore extremely flexible fromfthe standlpoint- ,ofrendering possible the zi gircwi sion of a Wide Varietyf-o-f beam compasses. .It,wi1l

duced. ,byf.,-the employment of my kit with an x i rendered possible by the 'entreme simplicr ?it y0f the component parts ofmy clevice by the sep ara-bility of its "elements, thereby, ren- 110 also be-0bserved that beam comp asses,h'zuimg widely varying'character sticsfmay be. p

tion does not reside in the specific variations of the engagement members, these difierences being variable to suit differing requirements; but rather in the'generic similarity between the engagement members, whereby selected ones may be interchangeably associated with the beam. It will also be obvious that the clamping devices illustrated and described may be modified in various ways without departing from the basic nature thereof whereby the construction is rendered extremelysimple, and whereby a single adjustment will simultaneously secure an engagement jmember and the clamping device'itself to'the beam. Furthermore, it

will be obvious that m'any changes in the details herein described and illustrated for the'pu1p0se of explaining the nature of my invention may be made by those skilled in the art withoutdeparting from the spirit and scope 'of the invention as expressed in the appended claims. It is therefore intended that these details be interpreted as illustrative, and not in a limiting sense.

Having thus described my invention and illustrated 1ts use, What I claim as new and desire to secureiby Letters'Patent 'is. r

1. In a beam compass kit for usea-s an auxiliary to a set of drawing instruments, a beam, a pair of independent engagement members variably constructed and arranged to accommodate differing instruments, and a pair of clamping devices slidably adjustable along the beam, each of said devices being provided with means for interchangeably securing either of said members to the beam, whereby selected instruments may be variably associated with the beam to provide beam compasses of desired predetermined characteristics. i s

"2. In a beam compass kit for use as an auxiliary to a set of drawing instruments, a beam, a pair of independent engagement members variably constructed and arranged to accommodate differing instruments, and a pair of clamping devices slidably adjustable along the beam, each of said devices being provided with means for interchangeably securing either of said members to the beam, whereby selected instruments may be variably associated with'the beam to provide beam compasses of desired predetermined characteristics, said means comprising adjustable thumbscrews each of which engages both the clamping device and the member and is arranged so that adjustment thereof will simultaneously associate the beam, the device, and the member-in mutual security.

3. In a beam compass kit for use as an auxiliary to a set of drawing instruments, a beam, a pair of independent engagement membersvariably constructed and arranged to accommodate dilfering instruments, and a pair of clamping devices slidably' adjustable along the beam, each. of said devices having a threaded bore and being provided with means for interchangeably securing either of said members .to the beam, said means comprising an'adjustable threaded element engaging within said bore and so constructed and arranged that adjustment of said threaded element will loosen or tighten the device with respectto the beam.

4. In a beam compass kit for use as an auxiliary to a set of drawing instruments, a

beam, a pair of independent engagement members variably constructed and arranged to accommodate differing instruments, and means for ad ustably securing said members in spaced positions along said beam, where- 'by selected instruments may be variably asmeans for adjustably securing said members in spaced positions along said beam, whereby selected instruments may be variably associated with the beam to provide beam compasses of desired'predetermined characteristics, each of said engagement members comprisinga body portion engageable by said means and opposite endportions variably configured to provide accommodation.

for a different type'of instrument in each thereof. a

6. In a beam compass kit for use as an auxiliary to aset of drawing instruments,

a beam, a'pair of independent engagement members variably constructed and arranged to accommodate differing instruments, and

means for adjustably securing'said members in spaced positions along said beam, wherea by selected instruments may be variably associated with the beam to provide beam compasses of desired predetermined characteristics, each of said engagement members comprising a single blank shaped to provide abody portion engageable by said means and crimped end portions adapted to engage said instruments.

7. In a beam compass'kit for use as an auxiliary to a set of drawing instruments, 1

j a beam, a pair of independent engagement members variably constructed and arranged to accommodate differing instruments, and.

means for adjustably securing members in spaced positions along said beam, whereby selected instruments maybe variably associated with the beam to provide beam compasses of, desired predetermined characterlstics, each of said engagement members comprising an integral-blank configured to provide a'substantially flat medial portion engageable by said means and crimped end portions of diiiering configurations adapted to accommodate a different type of instrument in each thereof.

8. In a beam compass kitfor use as an auxiliary 'to a set of drawing instruments,

'a beam, a pair of independent engagement members variably constructed and arranged to accommodate ClllIQIlIlg instruments, and

means for adjustably securing members in spaced positions along said beam, whereby selected instruments may be variably associated with the beam to provide beam compasses of desired predetermined characteristlcs, said means comprising relativelyadjustable elements whereot one-1s shaped to slidably engage the beam and the other is.

r in engagementwith the first and is adapted to accommodate difl'ering instruments, and

means for adjustablysecuring members in spacedpositions along said beam, whereby selected instrumentsjmay be variably associated with the beam to provide beam compasses of desired predetermined characteristics, said means comprising relatively adjustably elements whereof one is shaped to slidably embrace the beam and the other is designed to engage one of said engagement members in a manner whereby mutual adjustment of said elements. will cause the slidable element and the members simultaneously to bind against opposite sides of the V tions which are shaped to provide channels beam. r

10. In a beam compass kit for use as an auxiliary to a set of drawing instruments,

a slotted beam, a-pair of independent en gagement members variably constructed and arranged to accommodate difi'ering instruments, and means for 'adjustably securing said members in spaced positions along said beam, whereby selected instruments may be variably associated with the beam to provide beam compasses of desired predetermined characteristics, said means comprising .relatively adjustable elements one of which slid-i 7 ably engages one side of the beam and the other or which extends through said slot to the other side of the beam, said last named j element being designed to engage one of said engagement members and hold it against the last mentioned beam side.

11'. In a beam compass, a beam having a longitudinal slot, an engagement member nel element slidably engaging the beam and a a tie elementextending through the slot and engaging'the channel element, said tie ele- ;ment being arranged to engage said engagecomprising an integral blank having a medial body portion and crimped ends for ment member on the other side of the beam. 12. In a beam compass, a beam, a clamping device slidably mounted thereon, an instrument-engaging member "comprising an integral blank having a body portion and means for removab'ly connecting said body portion and said clamping device, said engaging member having opposite end portions which are shaped to provide channels for the accommodation thereunder andagainst the beam of selected instruments of a drawing set. i 13. In a beam compass, abeam, a clamping device slidably mounted thereon, an instrument-engaging member comprising an integral blank having a body portion, and

gaging member having oppositeend pol tlons which are shaped to provide channels 'means for removably connecting said body portlon and sald'clamping device, said ena drawing set, said channels being arranged I along axes forming acute angles with the other edgesof the blank. f

14. In a beam compass, a beam, a clamping device slidably mounted thereon, fan instrument-engaging member comprising an integral blank having'a body portion, and means for removably connectingsaid body portion and said clamping device, said engaging member having opposite end porfor the accommodation thereunder and againstthe beam of selected instruments of- .ent dimensions and configurations whereby one or the'other may be selected for the accommodation of a desired instrument.

In witnessfwhereof, I havesigned this FRANK SCHWARTZ. 

